Br. Reddy et P. Venkateswarlu, INFRARED TO VISIBLE ENERGY UP-CONVERSION IN ER-3-DOPED OXIDE GLASS(), Applied physics letters, 64(11), 1994, pp. 1327-1329
Intense green emission was observed at room temperature from the S-4(3
/2) level of Er3+ doped in a multielement oxide glass when its I-4(9/2
) level was resonantly excited with a near-infrared laser beam of 797
nm. Our studies indicate that energy transfer and excited state absorp
tion are responsible for the generation of upconverted green emission
from the sample. The upconversion efficiency is found to be 0.14%.